don't take chantix if you've had a serious allergic or skin reaction to it. if you develop these stop taking chantix and see your doctor right away as some can be life-threatening. if you have a history of heart or blood vessel problems, tell your doctor if you have new or worse symptoms. get medical help right away if you have symptoms of a heart attack. use caution when driving or operating machinery. common side effects include nausea, trouble sleeping and unusual dreams. it helps to have people around you... they say, you're much bigger than this. and you are. [ male announcer ] ask your doctor if chantix is right for you. >>> welcome back to "cnn newsroom." when it comes to norway's music scene, here is what's topping the charts. ♪ that's where i had my first heartbreak ♪ ♪ i still remember how it all changed ♪ ♪ don't you worry ♪ don't you worry child ♪ see heaven's got a plan for you ♪ ♪ don't you worry ♪ don't you worry now >> this is the group swedish house mafia with their hit "don't you worry child." they're also topping the cha